CN1609379A - Fibre reinforced plastic and concrete composite arc structure and construction method - Google Patents
Fibre reinforced plastic and concrete composite arc structure and construction method Download PDFInfo
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- CN1609379A CN1609379A CN 200410081262 CN200410081262A CN1609379A CN 1609379 A CN1609379 A CN 1609379A CN 200410081262 CN200410081262 CN 200410081262 CN 200410081262 A CN200410081262 A CN 200410081262A CN 1609379 A CN1609379 A CN 1609379A
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Abstract
The present invention relates to building member and its construction process and is especially composite arched structure of fiber reinforced plastic and concrete. The present invention proposes one kind of arced structure with laminated fiber reinforced plastic adhered to the surface of concrete and its construction process. The construction process includes forming concrete arch, milling surface with grinding wheel to eliminate floated surface mortar and roughen the surface, smearing epoxy resin-cement putty to flat the surface, painting primer with structural glue, coating with fiber fabric, soaking the fiber fabric with resin adhesive, covering with polyester film, extruding with scraper the excessive resin adhesive, curing and taking down the polyester film. The composite arched structure is corrosion resistant and durable, and has doubled bearing capacity and simple construction.
Description
One, technical field
The present invention relates to building unit and job practices, arch structure and job practices that especially a kind of fibre reinforced plastics and concrete are compound.
Two, background technology
1, fiber reinforced plastic materials and forming method thereof
The English name of fibre reinforced plastics is " Fiber Reinforced Plastics ", because its english abbreviation is FRP, therefore also often is called as the FRP material, and itself is a kind of advanced composite material (ACM), is made up of high performance fiber and base material.
Fiber generally is that diameter is the continuous fiber of 5～20 μ m, makes by special drawing process.The utilization fibrous material is owing to after the material of large scale is made fiber, its physical and mechanical property can significantly improve, for example the hot strength of simple glass has only 40 ~ 100Mpa, and intensity can reach 2000Mpa behind the drawing fiber, utilization efficiency of material not only can be improved like this, and the more superior new material of performance can be createed.
Base material is made up of resin and curing compound.Soak into fiber with resin (in add curing compound), treat just to have formed fibre reinforced plastics (Fiber Reinforced Plastics) behind the resin solidification, be called for short FRP.
The FRP material has following main good characteristic: density is little, is 1/6 ~ 1/3 of common iron; Intensity height, tensile strength are about 1.5 ~ 6 times of plain bars; Corrosion resistance is good, the influence of intensity acid and alkali caustic corrosion medium; Underrelaxation; Non magnetic, do not influence the propagation of electromagnetic signal; Anti-fatigue performance is good, generally is higher than steel fatigue life; The temperature variable coefficient is suitable with concrete; Modulus of elasticity is between concrete and steel; Limit elongation is 1% ~ 3%.
According to the composition difference of fiber among the FRP, the FRP material can be divided into CFRP (Carbon FiberReinforced Plastics)---carbon fibre reinforced plastic, GFRP (Glass FiberReinforced Plastics)---glass fiber reinforced plastics and aromatic polyamide fiber reinforced plastics etc.
The FRP material has good performance, is commonly used in some special structures.In civil engineering, utilization carbon fibre material (CFRP) carries out reinforcement, reinforcing to the old concrete structure, is a kind of very general way at present.
2, concrete arch structure and job practices thereof
Domes are a kind of form of structure commonly used in the civil engineering.
From aesthstic angle, the linear mellow and full smoothness of arch structure, easy and environmental harmony, create an aesthetic feeling.
From the mechanics angle, when the arch structure bearing load, arch structure except that bearing vertical counter-force, also will bear horizontal thrust at the arch springing place.With stride the girder structure that the footpath equates and compare, just because of the horizontal thrust at arch springing place, make the moment of flexure in corresponding cross section in the arch structure be far smaller than the moment of flexure in the girder structure, therefore, the tensile stress in arch structure cross section generally is far smaller than the tensile stress in girder structure cross section.Under special load (as the hydrostatic pressure) effect, arch structure can realize that by the adjustment of arch axis shape the full arch cross section all is in compressive stress state.Yet, in the practice process, because the requirement of load factor and structure is a compressive stress state though the adjustment of arch axis line generally can make the section stress of most of section in the arch structure, can make the cross section of the part section in the arch structure tensile stress occur inevitably.
Because the compressive property of building stones is good, and tensile property is poor, so building stones usually are used to build the domes based on pressure-bearing.After concrete material occurs, owing to its good pressure resistance energy and workability, therefore become the main material of arch structure gradually, the overwhelming majority is a concrete arch-type bridge near, the modern arch bridge.Along with the development of material subject, utilize concrete filled steel tube and steel to build many arch bridges at present, yet medium and small preferred material of striding the footpath domes still is a concrete.
For the concrete arch structure, though have only in the cross section of small part section tensile stress arranged, but because the tensile property of concrete material is poor, 1/8 ~ 1/12 of its compressive strength is only arranged, so these cross sections with tensile stress usually are the control cross sections in arch structure design and the operation.In case the tensile stress in these cross sections surpasses concrete tensile strength, cracking will appear in concrete arch, and crackle often develops rapidly at the plane of weakness place.
The development of cracking and crackle can weaken the integral rigidity of structure, makes malformation increase, power performance deterioration, and the degree of safety of structure descends.Sometimes even can cause structural break, integral body taking place collapses.
For this situation is improved, common way is to adopt steel concrete to build arch structure now, in the steel concrete arch structure, because action of steel bars, the development of cracking back crackle can obtain containment to a certain degree, and every performance of structure can be greatly improved.Because reinforcing bar shared area in whole cross section is very little, therefore the employing of steel concrete often plays effect hardly to the cracking of plane of weakness, the cracking load that yet is the steel concrete arch structure can obviously not improve, that is to say that the steel concrete arch structure improves is structural performance behind the structure crack.
Like this, when load increased, the steel concrete arch structure still ftractureed, and the development of cracking and crackle still can weaken the integral rigidity of structure, makes malformation increase, power performance deterioration, and the degree of safety of structure descends, and only at this moment degree weakens to some extent.On the other hand, the utilization of reinforcing bar certainly exists the corrosion problem, and the existence of crackle can aggravate the corrosion of reinforcing bar again, and durability of structures is descended.Therefore be necessary to adopt other measure to improve the performance of concrete arch structure better.
Three, summary of the invention
The purpose of this invention is to provide a kind of simple structure, with stratiform fibre reinforced plastics and compound arch structure and the job practices of concrete.
The technical scheme that purpose of the present invention adopted is:
Compound arch structure is: include the concrete arch of curved shape, its concrete arch outer wall is pasted with fiber-reinforced plastic layer.
The present invention, concrete arch can be the plain concrete arch, also can be reinforced concrete arch.
Compound arch structure job practices:
At first adopt the construction of rack construction or segment lifting to form concrete arch, treat that concrete intensity reaches 80% when above of design strength, beginning is pasted with fiber-reinforced plastic layer at the outer wall of concrete arch, specifically job practices:
A, with emery wheel concrete arch surface laitance is erased, and made concrete surface have certain roughness, circle is smeared with emery wheel in the corner in cross section;
The hole of b, the floating concrete surface of usefulness epoxy cement putty, and at concrete surface brush substructure glue, the thickness of substructure glue is 0.2-1mm;
After c, the substructure brushing in 1 hour, fibre layered the weaving cotton cloth of surperficial smooth-going parcel of substructure glue;
D, at fibre layered surface manual brush resin of weaving cotton cloth, resin mortar fully soaks into fibre layered weaving cotton cloth;
E, cover with polyester film and to be soaked with the fibre layered of resin mortar and to weave cotton cloth, and scraper plate squeezes out rich resin mortar by hand;
F, treat that resin material solidifies after, throw off the polyester film on surface, general one day of resin material is promptly curable, and can reach behind 70%, 7 day of its final strength substantially can reach more than 90% of its final strength.
The present invention, substructure glue can be epoxy resin, or alkyd resin, and perhaps other resin contains curing compound in the resin material, and the part by weight of curing compound and resin is 30-40: 100.
The present invention, indication is fibre layered weaves cotton cloth and weaves cotton cloth for glass fiber, or carbon-fiber cloth.
Advantage of the present invention:
When the compound arch structure of fibre reinforced plastics and concrete is stressed, on the section of moment of flexure acting section, because the remarkable tension effect of FRP makes cross section concrete cracking load significantly improve, cracking back crack growth is slow, and structure bearing capacity is also significantly improved thereupon.
Ordinary concrete in laboratory arch and fibre reinforced plastics-concrete composite arch (FRP thickness wherein is 0.5 millimeter) load test show stride the footpath on an equal basis, the compound arch structure of fibre reinforced plastics and the concrete of sectional dimension is compared with the ordinary concrete arch structure on an equal basis, cracking load has improved 120%, and ultimate load has improved 212%.
Fibre reinforced plastics and the compound arch structure of concrete are adopted in this explanation, under the same sectional dimension situation, can increase the footpath of striding of structure; Same striding under the situation of footpath, can reduce the size in cross section.Same sectional dimension, same striding under the situation of footpath can make structure have higher safety stock.
In addition,, can effectively stop moisture to enter inside concrete, can stop the corrosion of reinforcing bar in the concrete structure, significantly improve durability of structures because outside FRP material has superior corrosion resistance and hermetic type.
Four, description of drawings
Further specify the present invention below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present invention;
Fig. 2 is that Figure 1A-A is to the TV structure schematic diagram.
Among the figure: 1-fiber-reinforced plastic layer 2-concrete arch
Five, the specific embodiment
As shown in Figure 1 and Figure 2, concrete arch 2 outer walls are pasted with fiber-reinforced plastic layer 1.
Job practices embodiment: adopt rack construction to form concrete arch 2, treat that concrete intensity reaches 86% o'clock of design strength, with electric wheel concrete arch 2 surperficial laitances are erased, form certain roughness, the corner in cross section is smeared circle, use the hole of the floating concrete surface of epoxy putty again, and on concrete surface brush the bottom structure glue, substructure glue is made by weight 100: 32 by epoxy resin and epoxy hardener, substructure glue thickness is 0.4mm, treat the brushing of substructure glue after 50 minutes, weave cotton cloth, more manual brush resin on the glass fiber stratiform is weaved cotton cloth in the surperficial smooth-going parcel glass fiber stratiform of substructure glue, resin is made by weight 100: 32 by epoxy resin and epoxy hardener, the abundant sized glass fibres stratiform of resin mortar is weaved cotton cloth, and cover on the glass fiber stratiform that is soaked with resin mortar weaves cotton cloth with polyester film, and scraper plate squeezes out rich resin mortar by hand, after treating one day resin solidification, throw off the polyester film on surface, after 7 days, formed compound arch.
If the present invention requirement of engineering, makes two-layer or the multi-layer fiber stratiform is weaved cotton cloth, and the second layer is fibre layered weaves cotton cloth at the fibre layered surface parcel of weaving cotton cloth that soaks into, and repeats above-mentioned job practices, the through required number of plies or the thickness of arriving.
Claims (6)
1. fibre reinforced plastics and the compound arch structure of concrete include the concrete arch (2) that is arcuation, it is characterized in that concrete arch (2) outer wall is pasted with fiber-reinforced plastic layer (1).
2. a kind of fibre reinforced plastics according to claim 1 and the compound arch structure of concrete is characterized in that concrete arch (2) can be the plain concrete arch, also can be reinforced concrete arches.
3. fibre reinforced plastics and the compound arch structure job practices of concrete at first adopt the construction of rack construction or segment lifting to form concrete arch (2), treat that concrete intensity reaches 80% when above of design strength, is characterized in that:
A, with emery wheel the surperficial laitance of concrete arch (2) is erased, and made concrete surface have certain roughness, circle is smeared with emery wheel in the corner in cross section;
The hole of b, the floating concrete surface of usefulness epoxy cement putty, and at concrete surface brush substructure glue, the thickness of substructure glue is 0.2-1mm;
After c, the substructure brushing in 1 hour, fibre layered the weaving cotton cloth of surperficial smooth-going parcel of substructure glue;
D, at fibre layered surface manual brush resin of weaving cotton cloth, resin mortar fully soaks into fibre layered weaving cotton cloth;
E, cover with polyester film and to be soaked with the fibre layered of resin mortar and to weave cotton cloth, and scraper plate squeezes out rich resin mortar by hand;
F, treat that resin material solidifies after, throw off the polyester film on surface, general one day of resin material is promptly curable, and can reach behind 70%, 7 day of its final strength substantially can reach more than 90% of its final strength.
4. the arch structure job practices that a kind of fibre reinforced plastics according to claim 3 and concrete are compound, it is characterized in that substructure glue can be epoxy resin, or alkyd resin, perhaps other resin, contain curing compound in the resin material, the part by weight of curing compound and resin is 30-40: 100.
5, the compound arch structure job practices of a kind of fibre reinforced plastics according to claim 3 and concrete is characterized in that fibre layered weaving cotton cloth weave cotton cloth for glass fiber, or carbon-fiber cloth.
6. the arch structure job practices that a kind of fibre reinforced plastics according to claim 3 and concrete are compound, it is characterized in that the surface brush resin of weaving cotton cloth fibre layered, resin can be epoxy resin, or alkyd resin, perhaps other resin, contain curing compound in the resin material, the part by weight of curing compound and resin is 30-40: 100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410081262 CN1609379A (en) | 2004-11-12 | 2004-11-12 | Fibre reinforced plastic and concrete composite arc structure and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410081262 CN1609379A (en) | 2004-11-12 | 2004-11-12 | Fibre reinforced plastic and concrete composite arc structure and construction method |
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| CN1609379A true CN1609379A (en) | 2005-04-27 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2470396A (en) * | 2009-05-21 | 2010-11-24 | Katherine Dallas The Brick Works, Bellingdon, Chesham, Bucks | A Method of creating a decorative architectural feature |
| CN101701449B (en) * | 2009-09-30 | 2011-11-23 | 易志坚 | Steel bridge floor cracking inhibition paving structure and construction method thereof |
| CN102704623A (en) * | 2012-06-12 | 2012-10-03 | 大连理工大学 | Combined FRP(Fiber Reinforced Plastic)-self prestressed concrete structure |
| CN101351604B (en) * | 2005-11-04 | 2013-12-04 | 雷福斯技术股份有限公司 | Reinforcement for concrete elements and system and method for producing reinforced concrete elements |
| CN108612185A (en) * | 2018-05-18 | 2018-10-02 | 西南交通大学 | The means of defence of concrete structure |
| CN109138162A (en) * | 2018-09-07 | 2019-01-04 | 中国人民解放军陆军工程大学 | A kind of prefabricated arches and production method |
| CN110130712A (en) * | 2019-05-16 | 2019-08-16 | 中国人民解放军陆军工程大学 | A kind of high-mechanic antidetonation is collapsed arch structure |
-
2004
- 2004-11-12 CN CN 200410081262 patent/CN1609379A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351604B (en) * | 2005-11-04 | 2013-12-04 | 雷福斯技术股份有限公司 | Reinforcement for concrete elements and system and method for producing reinforced concrete elements |
| GB2470396A (en) * | 2009-05-21 | 2010-11-24 | Katherine Dallas The Brick Works, Bellingdon, Chesham, Bucks | A Method of creating a decorative architectural feature |
| GB2470396B (en) * | 2009-05-21 | 2014-11-12 | Katharine Dallas | Decorative architectural features |
| CN101701449B (en) * | 2009-09-30 | 2011-11-23 | 易志坚 | Steel bridge floor cracking inhibition paving structure and construction method thereof |
| CN102704623A (en) * | 2012-06-12 | 2012-10-03 | 大连理工大学 | Combined FRP(Fiber Reinforced Plastic)-self prestressed concrete structure |
| CN102704623B (en) * | 2012-06-12 | 2015-03-25 | 大连理工大学 | Combined FRP(Fiber Reinforced Plastic)-self prestressed concrete structure |
| CN108612185A (en) * | 2018-05-18 | 2018-10-02 | 西南交通大学 | The means of defence of concrete structure |
| CN109138162A (en) * | 2018-09-07 | 2019-01-04 | 中国人民解放军陆军工程大学 | A kind of prefabricated arches and production method |
| CN110130712A (en) * | 2019-05-16 | 2019-08-16 | 中国人民解放军陆军工程大学 | A kind of high-mechanic antidetonation is collapsed arch structure |
| CN110130712B (en) * | 2019-05-16 | 2024-04-30 | 中国人民解放军陆军工程大学 | High-bearing anti-seismic arch collapse structure |
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